CVE-2026-33069 MEDIUM

CVE-2026-33069: PJSIP has an Out-of-bounds Read in SIP multipart parsing

Vendor Pjsip
Product pjproject
Weakness CWE-125
Published March 20, 2026
Last update March 20, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below have a cascading out-of-bounds heap read in pjsip_multipart_parse(). After boundary string matching, curptr is advanced past the delimiter without verifying it has not reached the buffer end. This allows 1-2 bytes of adjacent heap memory to be read. All applications that process incoming SIP messages with multipart bodies or SDP content are potentially affected. This issue is resolved in version 2.17.

Key dates

02Disclosure timeline

March 20, 2026 CVE published
March 20, 2026 Record updated